Use meta key + wheel to zoom in/out ()

This commit is contained in:
Timur Khazamov
2020-02-16 14:38:53 +01:00
committed by GitHub
parent 360864ef3d
commit eee961d65f
4 changed files with 20 additions and 11 deletions

@ -27,4 +27,4 @@ export {
hasText,
} from "./comparisons";
export { createScene } from "./createScene";
export { getZoomOrigin, getZoomTranslation } from "./zoom";
export { getZoomOrigin, getZoomTranslation, getNormalizedZoom } from "./zoom";

@ -28,3 +28,9 @@ export function getZoomTranslation(canvas: HTMLCanvasElement, zoom: number) {
y: parseFloat(diffMiddleOfTheCanvas.y.toFixed(8)),
};
}
export function getNormalizedZoom(zoom: number): number {
const normalizedZoom = parseFloat(zoom.toFixed(2));
const clampedZoom = Math.max(0.1, Math.min(normalizedZoom, 2));
return clampedZoom;
}